ADOT advises drivers who travel I-40 in Flagstaff to plan for possible long delays while crews continue pavement preservation work and the installation of a temporary concrete barrier. Restrictions will occur daily from 6-am Monday, September 27-th to 7-pm on Thursday, September 30-th. Walnut Canyon Road Bridge will be narrowed to one lane with alternating north and southbound travel over I-40. Country Club Drive Bridge will be narrowed to one lane in each direction.